The following bug has been logged online:

Bug reference:      5476
Logged by:          Piergiorgio Buongiovanni
Email address:      p.buongiova...@net-international.com
PostgreSQL version: 8.3.4
Operating system:   CentOS (Redhat 5.4)
Description:        sequence corruption
Details: 

We experimented a sequence corruption on a table:
If we now look at the sequence data using pgAdmin version 1.8.4, we see the
following:

CREATE SEQUENCE business.subject_isid_seq
  INCREMENT 1
  MINVALUE 1
  MAXVALUE 9223372036854775807
  START 58827944
  CACHE 1;
ALTER TABLE business.subject_isid_seq OWNER TO netdw_owner;

The problem is that now the search on the table business.Subject (where the
sequence is used) performs very slowly. It seems the data are corrupted but
at the end I can see that there is a record created with the number 463663
instead of 57. As you can see the next value will be used is 58827944.
Which is the problem? Can I recover this situation and restore the right
sequence value? I tried to set the START value to 58 but, as you can see,
the value changed.

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